Blinking Orange Battery Light - Help!

I have Windows Vista (Dell Inspiron 1525) and recently the light that shows that my laptop is charging started blinking orange four times, then blue once. It says it's fully charged, but as soon as it's not connected to the wall outlet it acts as if it's completely empty. Any help would be greatly appreciated!

You are better off getting this moved to hardware, as it is not a Vista problem and you will find more peple able to help over there. As for the prob, does your manual tell yo uanything? have a lok through and see what it says.